/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.client.impl;

import org.apache.ignite.internal.client.GridClientException;
import org.apache.ignite.internal.client.GridClientFuture;

/**
 * Future callback will be notified, when listened future finishes (both succeed or failed).
 * @param <R> Input parameter type.
 * @param <S> Result type.
 */
public interface GridClientFutureCallback<R, S> {
    /**
     * Future callback to executed when listened future finishes.
     *
     * @param fut Finished future to listen for.
     * @return Chained future result, if applicable, otherwise - {@code null}.
     */
    public S onComplete(GridClientFuture<R> fut) throws GridClientException;
}